characters to terminate the read
length of stop_chars. May be -1 if stop_chars is nul-terminated
a #gsize to get the length of the data read in
optional #GCancellable object, null to ignore
a string with the data that was read before encountering any of the stop characters. Set length to a #gsize to get the length of the string. This function will return null on an error
Reads a string from the data input stream, up to the first occurrence of any of the stop characters.
In contrast to gio.data_input_stream.DataInputStream.readUntil, this function does not consume the stop character. You have to use gio.data_input_stream.DataInputStream.readByteData to get it before calling gio.data_input_stream.DataInputStream.readUpto again.
Note that stop_chars may contain '\0' if stop_chars_len is specified.
The returned string will always be nul-terminated on success.